In a 1946 article in "Breeding and Seedgrowing" 9-10:34-42, N P Nizenjkov
discusses the possibility of determining the frost and drought
susceptibility of various grain crops. He used two needles of differing
metals to measure an electromotive force which was "found to be proportional
to the water content of the tissue."
Is this not more likely to be a function of the electrolyte concentration as
well as the water potential within the plant?
Has any work been conducted since in this area, and if so, is this an
established and useable principle?
If so, are there established principles and procedures
based on this phenomenon?
Bruce Metelerkamp
bruce at icfr.unp.ac.za
Institute of Commercial Forestry Research,
University of Natal, Pietermaritzburg, South Africa
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Bruce Metelerkamp SOIL WATER RESEARCH OFFICER
Institute for Commercial Forestry Research,
University of Natal, PO Box 100281
Scottsville, KwaZulu-Natal ZA3209
Rep. of South Africa Voice:27 331 62314
E-mail: bruce at icfr.unp.ac.za FAX:27 331 68905